var orange = {
    weight:"200g",
    color:"orange",
    taste:"sour"
};
var car = {
    brand:"Jaguar",
    price:"$80000",
    model:"XFL"
}
function mainJs(a){
	//请在此处编写代码
    /*********begin*********/

        console.log(Object.getOwnPropertyNames(orange));

    /*********end*********/
}